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FR2418980A1 - DIGITAL FREQUENCY DISCRIMINATOR - Google Patents

DIGITAL FREQUENCY DISCRIMINATOR

Info

Publication number
FR2418980A1
FR2418980A1 FR7904996A FR7904996A FR2418980A1 FR 2418980 A1 FR2418980 A1 FR 2418980A1 FR 7904996 A FR7904996 A FR 7904996A FR 7904996 A FR7904996 A FR 7904996A FR 2418980 A1 FR2418980 A1 FR 2418980A1
Authority
FR
France
Prior art keywords
control input
digital frequency
frequency discriminator
counter
closed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
FR7904996A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Corp
Original Assignee
Siemens Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Corp filed Critical Siemens Corp
Publication of FR2418980A1 publication Critical patent/FR2418980A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
    • G01R23/10—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage by converting frequency into a train of pulses, which are then counted, i.e. converting the signal into a square wave
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K9/00—Demodulating pulses which have been modulated with a continuously-variable signal
    • H03K9/06—Demodulating pulses which have been modulated with a continuously-variable signal of frequency- or rate-modulated pulses

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Measuring Frequencies, Analyzing Spectra (AREA)
  • Circuits Of Receivers In General (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Manipulation Of Pulses (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

L'invention concerne un discriminateur numérique de fréquence. Dans ce dispositif comportant un dispositif de commutation, ce dernier comporte une porte de commande temporelle TS, ZS, possédant une entrée de commande << ouvert >> A et une entrée de commande << fermée >> Z et par l'intermédiaire de laquelle un signal, de mesure Sf est envoyé lors de chaque apparition d'une impulsion de départ à l'entrée de commande << ouvert >> pendant n périodes du signal de mesure à un compteur ZR, qui active, après chaque nième impulsion, l'entrée de commande << fermée >> de la porte TS, ZS, et il est prévu un système logique d'exploitation AS qui compare le temps de comptage du compteur à la période du signal de référence et à la suite duquel est branché un circuit d'intégration IS à la sortie duquel peut être prélevée la grandeur pour laquelle a eu lieu la discrimination de fréquence. Application notamment aux oscillateurs de récepteurs radio.The invention relates to a digital frequency discriminator. In this device comprising a switching device, the latter comprises a time control gate TS, ZS, having an "open" control input A and a "closed" control input Z and through which a measurement signal Sf is sent on each appearance of a starting pulse at the "open" control input for n periods from the measurement signal to a counter ZR, which activates, after each nth pulse, l 'closed' control input of the TS, ZS gate, and an AS operating logic system is provided which compares the counting time of the counter with the period of the reference signal and after which a integration circuit IS at the output of which the quantity for which the frequency discrimination has taken place can be taken. Application in particular to oscillators of radio receivers.

FR7904996A 1978-03-03 1979-02-27 DIGITAL FREQUENCY DISCRIMINATOR Withdrawn FR2418980A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782809315 DE2809315B2 (en) 1978-03-03 1978-03-03 Digital frequency discriminator

Publications (1)

Publication Number Publication Date
FR2418980A1 true FR2418980A1 (en) 1979-09-28

Family

ID=6033533

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7904996A Withdrawn FR2418980A1 (en) 1978-03-03 1979-02-27 DIGITAL FREQUENCY DISCRIMINATOR

Country Status (8)

Country Link
JP (1) JPS54135579A (en)
AU (1) AU4477179A (en)
BE (1) BE874579A (en)
DE (1) DE2809315B2 (en)
DK (1) DK89479A (en)
FR (1) FR2418980A1 (en)
GB (1) GB2016834A (en)
NL (1) NL7901717A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60109918A (en) * 1983-11-18 1985-06-15 Sankyo Seiki Mfg Co Ltd Discriminating circuit of input signal frequency
DE3634751A1 (en) * 1986-10-11 1988-04-14 Thomson Brandt Gmbh PHASE DISCRIMINATOR, ESPECIALLY FOR A PLL CIRCUIT

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1228993A (en) * 1968-03-15 1971-04-21
DE2513339A1 (en) * 1975-03-26 1976-10-07 Licentia Gmbh Tuner for HF superheterodyne receiver - has oscillator whose frequency is tuned by control voltage to receive required transmitter frequency
US4052676A (en) * 1976-06-10 1977-10-04 Woodward Governor Company Digital-analog frequency error signaling

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1228993A (en) * 1968-03-15 1971-04-21
DE2513339A1 (en) * 1975-03-26 1976-10-07 Licentia Gmbh Tuner for HF superheterodyne receiver - has oscillator whose frequency is tuned by control voltage to receive required transmitter frequency
US4052676A (en) * 1976-06-10 1977-10-04 Woodward Governor Company Digital-analog frequency error signaling
FR2371720A1 (en) * 1976-06-10 1978-06-16 Woodward Governor Co METHOD AND DEVICE FOR DETERMINING REPETITIVE TIME INTERVALS
FR2371727A1 (en) * 1976-06-10 1978-06-16 Woodward Governor Co SPEED REGULATION METHOD AND DEVICE

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/73 *

Also Published As

Publication number Publication date
JPS54135579A (en) 1979-10-20
NL7901717A (en) 1979-09-05
DK89479A (en) 1979-09-04
GB2016834A (en) 1979-09-26
AU4477179A (en) 1979-09-06
DE2809315A1 (en) 1979-09-06
BE874579A (en) 1979-07-02
DE2809315B2 (en) 1980-01-03

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Legal Events

Date Code Title Description
ST Notification of lapse